Connect to VPN by default

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/050e09e091117c3d7328c7b2b7b577492c43c134?narHash=sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu%2BMmzoVBJxulM%3D' (2025-11-22)
  → 'github:NixOS/nixpkgs/5ae3b07d8d6527c42f17c876e404993199144b6a?narHash=sha256-6eeL1YPcY1MV3DDStIDIdy/zZCDKgHdkCmsrLJFiZf0%3D' (2025-11-24)

flake.lock

@@ -454,11 +454,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1763835633,
+        "lastModified": 1763966396,
-        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "narHash": "sha256-6eeL1YPcY1MV3DDStIDIdy/zZCDKgHdkCmsrLJFiZf0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "rev": "5ae3b07d8d6527c42f17c876e404993199144b6a",
         "type": "github"
       },
       "original": {

modules/networking.nix

@@ -97,7 +97,6 @@ in
   };
   systemd.network.networks."wg0" = {
     matchConfig.Name = "wg0";
-    linkConfig.ActivationPolicy = "manual";
     networkConfig = {
       Address = [
         "10.8.0.2/32"